Co-Ni-Cr-Mo alloy with low Ti enables longer fatigue life.(MPMD)

Advanced Materials & Processes,  October, 2005  

Tags: Texas Instruments Inc.

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Although stainless steel 316L remains the workhorse material for stent tubing, cobalt-chromium and Nitinol have growth rates of over 100% for this application, reports Minitubes, France. The company offers alloy 35N LT as an alternative to MP35N. Although both of these alloys have roughly the same composition (35Co-35Ni-20Cr-10Mo), MP35N contains 1% titanium, while the 35N LT (low titanium) composition contains only 0.01% titanium.

The reduction in titanium content causes reduced inclusion sizes and distribution, better surface finish, and greatly improved fatigue life. In fact, ...

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